Method for purifying 1,1,1-tris(4-hydroxyphenyl)-alkanes

Abstract

Tris(4-hydroxyphenyl)alkanes such as 1,1,1 -tris(4-hydroxyphenyl)ethane are purified by formation of an adduct with a molar excess of a C.sub.1-4 primary alkyl tertiary amine, preferably triethylamine. Adduct formation is preferably effected in a polar organic solvent such as methanol. The pure tris(4-hydroxyphenyl)alkane may be recovered from the adduct by thermal or aqueous acid-promoted cracking.

Dependencies are inferred from the claim text.